Influence of two different heat treatment procedures on mechanical and fracture properties of 65 Si 7 steel.

• Autorzy: Pustaic D. , Cajner F.

Warianty tytułu

PL

Wpływ dwóch różnych procedur obróbki cieplnej na właściwości mechaniczne i pękanie stali 65 Si 7.

• Konferencja: XVIth Physical Metallurgy and Materials Science Conference on Advanced Materials and Technologies AMT'2001, Gdańsk-Jurata, 16-20 September 2001
• Języki publikacji: PL

Abstrakty

EN

This paper deals with the results of investigations of two different heat treatment procedures and their influence on some mechanical properties as well as on the magnitude of some fracture mechanics parameters for a particular type of steel. The experimental investigations were performed on the specimens made of 65Si7 steel. The processes occuring by tempering of two different microstructures of the steel, i. e. martensite and lower bainite were investigated. An advantage of austempering over hardening and tempering is in obtaining the bainite microstructure. Steel of bainite microstructure has a greater toughness, ductility, contraction, fatigue strength and better fracture toughness than a tempered martensite of the same type of steel. A bainite microstructure also gives a better resistance to thermal fatigue in comparison with martensite microstructure. The above mentioned improved values of mechanical properties refer to the untempered state of bainite.

Słowa kluczowe

PL

obróbka cieplna; właściwości mechaniczne; właściwości pękania; przełom; stal; mikrostruktura; odporność na zmęczenie cieplne materiału; bainit; martenzyt

EN

heat treatment; mechanical properties; fracture properties; fracture; steel; microstructure; resistance to thermal fatigue; bainite; martensite

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 2001
• Tom: R. XXII, nr 5
• Strony: 733--736
• Opis fizyczny: Bibliogr. 7 poz., tab., rys.

Twórcy

autor

Pustaic D.

• Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Croatia

autor

Cajner F.

• Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Croatia

• University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Croatia

Bibliografia

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• [2] Dobi, D., Cajner, F. and Junghans , E.: Mechanical behavior of tempered martensite and tempered bainite. In: Proc. of the 6th National Fracture Mechanics Seminarium, Miskolc, Hungary, (1997), 210.
• [3] Cajner, F.: Influence of microstructure on thermal fatigue resistance of hot-work tool steels. Strojarstvo, Journal for the Theory and Application in Mechanical Engineering, 33(5/6), (1991), 289.
• [4] Shiyu, H., Xiaozeng, F. and Susan, G.; The influence of the microstructures of martensite and bainite on the toughness of the steel for forging dies. In: 4th International Congress on Heat Treatment of Materials, Berlin, (1985), 446.
• [5] Åkerman, J.: The effect of cooling rate after austenitization on the properties of hot-work tool steels H 11 and H 13, Swedish Institute for Metals Research, (1980),
• [6] Rademacher, L.: Anlassen von Martensit und Bainit. Vergöten oder Verspröden? Harteärei Technische Mitteilungen, 33(5), (1978), 291.
• [7] Weckener, H.D.: Die Bedeutung der Zwischenstufe bei der Wärmebehandlung von Werkzeugstahlen. Technische Berichte 86, (1976).